In HTML5 we have the "download" attribute for the a-element (http://www.w3.org/TR/html5/links.html#attr-hyperlink-download). It would be nice if piwik handled an a-alement with a "download" attribute automatically as a download. Currently (if the file extension isn't known to piwik) I still have to add "class='piwik_download'" in order to enable proper tracking as download.